Working through a lengthy indented bom, and I update a lot of values at this stage using Edit multiple properties. However this morning its been updating the configuration specific ones (which I have none and parts usually only have one or 2 if sheet metal, configurations)

This is a pain as It means I need to open each part to update the custom propertys.

I've tried the options in the bom for part config grouping, I'm sure its a tick box somewhwere?

I usually have some in the template but working of a fresh install and wasn't looking at the right part template. I use the custom property manager to push them in usually. I am finding bom's in 2017 to be unreliable? perhaps. might just be my workflow of restructuring my boms but on a few occasions I've had parts missing from Boms. I've just had a similar issue and used Show Rows, and lots of my bom was hidden.